[TechAssist] Re: RCA Model# D52W20Byx1 Chassis ITC222 two bars rolling from left to right
- From: "Moutons Electronics L.L.C." <moutons@xxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 19 May 2005 17:19:22 -0500
The TV does it on both line AC and isolation and in either will only affect
the other tv's if a cable is connected to it.
I just got off the phone with Thomson Techline. They said they have heard of
that trouble before and usually was a ground problem, after I told him I
isolated it on the deflection/power board he quickly said he would give me a
authorization number to replace it. I was floored, the last time I tried to
get a modular replacement that was not warranty eligible it was like pulling
teeth and I had to call 4 or 5 time and order parts repeatedly.
He called the problem "FCC leakage", I know that the cable companies have to
constatly check there cable for signal leakage and stay under a FCC minimum,
maybe that was why he was quick to change the module since they don't want
to chance the FCC tracking down some roag signal back to there tv.
Especially since that happen last year, I am sure some of you on the list
remember the discussion about some 20" tv, I think, that was radiating a
strong signal which was picked up by the FCC. I believe after the
manufacturer found out about the problem they replaced the tv and took the
old one in for study.
Regardless my problem should be solved after I get the new module in.
Thanks
Jason
Moutons Electronics
----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, May 19, 2005 3:15 PM
Subject: [TechAssist] Re: RCA Model# D52W20Byx1 Chassis ITC222 two bars
rolling from left to right
>
> Check all the HV wires and be sure they are seated into the FBT and
> splitter properly. If not seated the can become a RF transmitter.
>
>
> ********************************
> Since 1972 *
> Jim Myers *
> Telrad Electronics *
> Fort Wayne Indiana *
> ********************************
>
>
> Moutons Electronics L.L.C. wrote:
>> Hello everyone, well this one is going to be a problem. This set has 2
>> white bars along with other disturbances in the picture rolling from left
>> to right. It seems to be worse on the low band but is still there on all
>> channels. Now for the strange problem. The symptoms seem to radiate to
>> all of the other tv's in the shop. It only bothers the ones on cable tv
>> if I have cable tv connected to the D52W20. When there is nothing
>> connected to the Rf input it only bothers the ones on Ant., Cable is
>> fine.
>> I already changed the main tuner and when that didn't fix it I swapped
>> the SSB board with another set. When the problem didn't travel with the
>> board I figured it has to be on the Defection/power board since I
>> disconnected the convergence power supple and the problem is still there.
>>
>> I have scoped the secondary of the run supply and the deflection supply
>> and see nothing of importants, nothing more than a volt and a half and
>> that was on the 200v supply and less than half vp-p on lesser supplies.
>> The horizontal waveform on the collector of the output looked good also.
>>
>> I am stuck and hope someone else has come across this before.
>>
>> Thanks
>>
>> Jason
>> Moutons Electronics
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